mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-09 02:09:53 -04:00
Mike Bayer
20cdc64588
become an externally usable package but still remains within the main sqlalchemy parent package. in this system, we use kind of an ugly hack to get the noseplugin imported outside of the "sqlalchemy" package, while still making it available within sqlalchemy for usage by third party libraries.
481 lines
17 KiB
Python
481 lines
17 KiB
Python
from sqlalchemy.testing import eq_
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import datetime
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from sqlalchemy import *
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from sqlalchemy.sql import table, column
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from sqlalchemy import sql, util
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from sqlalchemy.sql.compiler import BIND_TEMPLATES
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from sqlalchemy.testing.engines import all_dialects
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from sqlalchemy import types as sqltypes
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from sqlalchemy.sql import functions
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from sqlalchemy.sql.functions import GenericFunction
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from sqlalchemy.util.compat import decimal
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from sqlalchemy import testing
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from sqlalchemy.testing import fixtures, AssertsCompiledSQL, engines
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from sqlalchemy.dialects import sqlite, postgresql, mysql, oracle
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class CompileTest(fixtures.TestBase, AssertsCompiledSQL):
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__dialect__ = 'default'
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def tear_down(self):
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functions._registry.clear()
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def test_compile(self):
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for dialect in all_dialects(exclude=('sybase', 'access',
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'informix', 'maxdb')):
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bindtemplate = BIND_TEMPLATES[dialect.paramstyle]
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self.assert_compile(func.current_timestamp(),
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"CURRENT_TIMESTAMP", dialect=dialect)
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self.assert_compile(func.localtime(), "LOCALTIME", dialect=dialect)
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if dialect.name in ('firebird', 'maxdb'):
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self.assert_compile(func.nosuchfunction(),
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"nosuchfunction", dialect=dialect)
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else:
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self.assert_compile(func.nosuchfunction(),
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"nosuchfunction()", dialect=dialect)
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# test generic function compile
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class fake_func(GenericFunction):
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__return_type__ = sqltypes.Integer
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def __init__(self, arg, **kwargs):
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GenericFunction.__init__(self, arg, **kwargs)
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self.assert_compile(
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fake_func('foo'),
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"fake_func(%s)" %
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bindtemplate % {'name': 'param_1', 'position': 1},
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dialect=dialect)
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def test_use_labels(self):
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self.assert_compile(select([func.foo()], use_labels=True),
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"SELECT foo() AS foo_1"
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)
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def test_underscores(self):
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self.assert_compile(func.if_(), "if()")
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def test_generic_now(self):
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assert isinstance(func.now().type, sqltypes.DateTime)
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for ret, dialect in [
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('CURRENT_TIMESTAMP', sqlite.dialect()),
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('now()', postgresql.dialect()),
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('now()', mysql.dialect()),
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('CURRENT_TIMESTAMP', oracle.dialect())
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]:
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self.assert_compile(func.now(), ret, dialect=dialect)
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def test_generic_random(self):
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assert func.random().type == sqltypes.NULLTYPE
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assert isinstance(func.random(type_=Integer).type, Integer)
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for ret, dialect in [
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('random()', sqlite.dialect()),
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('random()', postgresql.dialect()),
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('rand()', mysql.dialect()),
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('random()', oracle.dialect())
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]:
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self.assert_compile(func.random(), ret, dialect=dialect)
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def test_custom_default_namespace(self):
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class myfunc(GenericFunction):
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pass
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assert isinstance(func.myfunc(), myfunc)
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def test_custom_type(self):
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class myfunc(GenericFunction):
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type = DateTime
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assert isinstance(func.myfunc().type, DateTime)
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def test_custom_legacy_type(self):
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# in case someone was using this system
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class myfunc(GenericFunction):
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__return_type__ = DateTime
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assert isinstance(func.myfunc().type, DateTime)
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def test_custom_w_custom_name(self):
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class myfunc(GenericFunction):
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name = "notmyfunc"
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assert isinstance(func.notmyfunc(), myfunc)
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assert not isinstance(func.myfunc(), myfunc)
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def test_custom_package_namespace(self):
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def cls1(pk_name):
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class myfunc(GenericFunction):
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package = pk_name
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return myfunc
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f1 = cls1("mypackage")
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f2 = cls1("myotherpackage")
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assert isinstance(func.mypackage.myfunc(), f1)
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assert isinstance(func.myotherpackage.myfunc(), f2)
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def test_custom_name(self):
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class MyFunction(GenericFunction):
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name = 'my_func'
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def __init__(self, *args):
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args = args + (3,)
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super(MyFunction, self).__init__(*args)
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self.assert_compile(
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func.my_func(1, 2),
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"my_func(:param_1, :param_2, :param_3)"
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)
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def test_custom_registered_identifier(self):
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class GeoBuffer(GenericFunction):
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type = Integer
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package = "geo"
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name = "BufferOne"
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identifier = "buf1"
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class GeoBuffer2(GenericFunction):
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type = Integer
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name = "BufferTwo"
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identifier = "buf2"
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class BufferThree(GenericFunction):
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type = Integer
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identifier = "buf3"
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self.assert_compile(
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func.geo.buf1(),
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"BufferOne()"
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)
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self.assert_compile(
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func.buf2(),
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"BufferTwo()"
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)
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self.assert_compile(
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func.buf3(),
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"BufferThree()"
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)
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def test_custom_args(self):
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class myfunc(GenericFunction):
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pass
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self.assert_compile(
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myfunc(1, 2, 3),
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"myfunc(:param_1, :param_2, :param_3)"
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)
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def test_namespacing_conflicts(self):
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self.assert_compile(func.text('foo'), 'text(:text_1)')
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def test_generic_count(self):
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assert isinstance(func.count().type, sqltypes.Integer)
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self.assert_compile(func.count(), 'count(*)')
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self.assert_compile(func.count(1), 'count(:param_1)')
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c = column('abc')
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self.assert_compile(func.count(c), 'count(abc)')
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def test_constructor(self):
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try:
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func.current_timestamp('somearg')
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assert False
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except TypeError:
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assert True
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try:
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func.char_length('a', 'b')
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assert False
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except TypeError:
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assert True
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try:
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func.char_length()
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assert False
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except TypeError:
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assert True
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def test_return_type_detection(self):
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for fn in [func.coalesce, func.max, func.min, func.sum]:
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for args, type_ in [
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((datetime.date(2007, 10, 5),
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datetime.date(2005, 10, 15)), sqltypes.Date),
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((3, 5), sqltypes.Integer),
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((decimal.Decimal(3), decimal.Decimal(5)),
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sqltypes.Numeric),
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(("foo", "bar"), sqltypes.String),
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((datetime.datetime(2007, 10, 5, 8, 3, 34),
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datetime.datetime(2005, 10, 15, 14, 45, 33)),
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sqltypes.DateTime)
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]:
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assert isinstance(fn(*args).type, type_), \
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"%s / %s" % (fn(), type_)
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assert isinstance(func.concat("foo", "bar").type, sqltypes.String)
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def test_assorted(self):
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table1 = table('mytable',
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column('myid', Integer),
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)
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table2 = table(
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'myothertable',
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column('otherid', Integer),
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)
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# test an expression with a function
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self.assert_compile(func.lala(3, 4, literal("five"),
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table1.c.myid) * table2.c.otherid,
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"lala(:lala_1, :lala_2, :param_1, mytable.myid) * "
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"myothertable.otherid")
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# test it in a SELECT
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self.assert_compile(select([func.count(table1.c.myid)]),
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"SELECT count(mytable.myid) AS count_1 FROM mytable")
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# test a "dotted" function name
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self.assert_compile(select([func.foo.bar.lala(table1.c.myid)]),
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"SELECT foo.bar.lala(mytable.myid) AS lala_1 FROM mytable")
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# test the bind parameter name with a "dotted" function name is
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# only the name (limits the length of the bind param name)
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self.assert_compile(select([func.foo.bar.lala(12)]),
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"SELECT foo.bar.lala(:lala_2) AS lala_1")
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# test a dotted func off the engine itself
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self.assert_compile(func.lala.hoho(7), "lala.hoho(:hoho_1)")
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# test None becomes NULL
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self.assert_compile(func.my_func(1, 2, None, 3),
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"my_func(:my_func_1, :my_func_2, NULL, :my_func_3)")
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# test pickling
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self.assert_compile(
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util.pickle.loads(util.pickle.dumps(
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func.my_func(1, 2, None, 3))),
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"my_func(:my_func_1, :my_func_2, NULL, :my_func_3)")
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# assert func raises AttributeError for __bases__ attribute, since
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# its not a class fixes pydoc
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try:
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func.__bases__
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assert False
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except AttributeError:
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assert True
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def test_functions_with_cols(self):
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users = table('users', column('id'), column('name'), column('fullname'))
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calculate = select([column('q'), column('z'), column('r')],
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from_obj=[func.calculate(bindparam('x', None), bindparam('y', None))])
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self.assert_compile(select([users], users.c.id > calculate.c.z),
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"SELECT users.id, users.name, users.fullname "
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"FROM users, (SELECT q, z, r "
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"FROM calculate(:x, :y)) "
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"WHERE users.id > z"
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)
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s = select([users], users.c.id.between(
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calculate.alias('c1').unique_params(x=17, y=45).c.z,
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calculate.alias('c2').unique_params(x=5, y=12).c.z))
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self.assert_compile(s,
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"SELECT users.id, users.name, users.fullname "
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"FROM users, (SELECT q, z, r "
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"FROM calculate(:x_1, :y_1)) AS c1, (SELECT q, z, r "
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"FROM calculate(:x_2, :y_2)) AS c2 "
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"WHERE users.id BETWEEN c1.z AND c2.z",
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checkparams={'y_1': 45, 'x_1': 17, 'y_2': 12, 'x_2': 5})
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def test_non_functions(self):
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expr = func.cast("foo", Integer)
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self.assert_compile(expr, "CAST(:param_1 AS INTEGER)")
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expr = func.extract("year", datetime.date(2010, 12, 5))
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self.assert_compile(expr, "EXTRACT(year FROM :param_1)")
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class ExecuteTest(fixtures.TestBase):
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@engines.close_first
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def tearDown(self):
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pass
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@testing.uses_deprecated
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def test_standalone_execute(self):
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x = testing.db.func.current_date().execute().scalar()
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y = testing.db.func.current_date().select().execute().scalar()
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z = testing.db.func.current_date().scalar()
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assert (x == y == z) is True
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# ansi func
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x = testing.db.func.current_date()
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assert isinstance(x.type, Date)
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assert isinstance(x.execute().scalar(), datetime.date)
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def test_conn_execute(self):
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from sqlalchemy.sql.expression import FunctionElement
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from sqlalchemy.ext.compiler import compiles
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class myfunc(FunctionElement):
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type = Date()
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@compiles(myfunc)
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def compile(elem, compiler, **kw):
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return compiler.process(func.current_date())
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conn = testing.db.connect()
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try:
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x = conn.execute(func.current_date()).scalar()
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y = conn.execute(func.current_date().select()).scalar()
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z = conn.scalar(func.current_date())
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q = conn.scalar(myfunc())
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finally:
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conn.close()
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assert (x == y == z == q) is True
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def test_exec_options(self):
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f = func.foo()
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eq_(f._execution_options, {})
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f = f.execution_options(foo='bar')
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eq_(f._execution_options, {'foo': 'bar'})
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s = f.select()
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eq_(s._execution_options, {'foo': 'bar'})
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ret = testing.db.execute(func.now().execution_options(foo='bar'))
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eq_(ret.context.execution_options, {'foo': 'bar'})
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ret.close()
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@engines.close_first
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def test_update(self):
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"""
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Tests sending functions and SQL expressions to the VALUES and SET
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clauses of INSERT/UPDATE instances, and that column-level defaults
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get overridden.
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"""
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meta = MetaData(testing.db)
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t = Table('t1', meta,
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Column('id', Integer, Sequence('t1idseq', optional=True),
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primary_key=True),
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Column('value', Integer)
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)
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t2 = Table('t2', meta,
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Column('id', Integer, Sequence('t2idseq', optional=True),
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primary_key=True),
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Column('value', Integer, default=7),
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Column('stuff', String(20), onupdate="thisisstuff")
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)
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meta.create_all()
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try:
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t.insert(values=dict(value=func.length("one"))).execute()
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assert t.select().execute().first()['value'] == 3
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t.update(values=dict(value=func.length("asfda"))).execute()
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assert t.select().execute().first()['value'] == 5
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r = t.insert(values=dict(value=func.length("sfsaafsda"))).execute()
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id = r.inserted_primary_key[0]
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assert t.select(t.c.id == id).execute().first()['value'] == 9
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t.update(values={t.c.value: func.length("asdf")}).execute()
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assert t.select().execute().first()['value'] == 4
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print "--------------------------"
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t2.insert().execute()
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t2.insert(values=dict(value=func.length("one"))).execute()
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t2.insert(values=dict(value=func.length("asfda") + -19)).\
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execute(stuff="hi")
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res = exec_sorted(select([t2.c.value, t2.c.stuff]))
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eq_(res, [(-14, 'hi'), (3, None), (7, None)])
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t2.update(values=dict(value=func.length("asdsafasd"))).\
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execute(stuff="some stuff")
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assert select([t2.c.value, t2.c.stuff]).execute().fetchall() == \
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[(9, "some stuff"), (9, "some stuff"),
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(9, "some stuff")]
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t2.delete().execute()
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t2.insert(values=dict(value=func.length("one") + 8)).execute()
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assert t2.select().execute().first()['value'] == 11
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t2.update(values=dict(value=func.length("asfda"))).execute()
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eq_(
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select([t2.c.value, t2.c.stuff]).execute().first(),
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(5, "thisisstuff")
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)
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t2.update(values={t2.c.value: func.length("asfdaasdf"),
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t2.c.stuff: "foo"}).execute()
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print "HI", select([t2.c.value, t2.c.stuff]).execute().first()
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eq_(select([t2.c.value, t2.c.stuff]).execute().first(),
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(9, "foo")
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)
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finally:
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meta.drop_all()
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@testing.fails_on_everything_except('postgresql')
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def test_as_from(self):
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# TODO: shouldnt this work on oracle too ?
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x = func.current_date(bind=testing.db).execute().scalar()
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y = func.current_date(bind=testing.db).select().execute().scalar()
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z = func.current_date(bind=testing.db).scalar()
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w = select(['*'], from_obj=[func.current_date(bind=testing.db)]).\
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scalar()
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# construct a column-based FROM object out of a function,
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# like in [ticket:172]
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s = select([sql.column('date', type_=DateTime)],
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from_obj=[func.current_date(bind=testing.db)])
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q = s.execute().first()[s.c.date]
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r = s.alias('datequery').select().scalar()
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assert x == y == z == w == q == r
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def test_extract_bind(self):
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"""Basic common denominator execution tests for extract()"""
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date = datetime.date(2010, 5, 1)
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def execute(field):
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return testing.db.execute(select([extract(field, date)])).scalar()
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assert execute('year') == 2010
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assert execute('month') == 5
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assert execute('day') == 1
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date = datetime.datetime(2010, 5, 1, 12, 11, 10)
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assert execute('year') == 2010
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assert execute('month') == 5
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assert execute('day') == 1
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def test_extract_expression(self):
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meta = MetaData(testing.db)
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table = Table('test', meta,
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Column('dt', DateTime),
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Column('d', Date))
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meta.create_all()
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try:
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table.insert().execute(
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{'dt': datetime.datetime(2010, 5, 1, 12, 11, 10),
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'd': datetime.date(2010, 5, 1)})
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rs = select([extract('year', table.c.dt),
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extract('month', table.c.d)]).execute()
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row = rs.first()
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assert row[0] == 2010
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assert row[1] == 5
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rs.close()
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finally:
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meta.drop_all()
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def exec_sorted(statement, *args, **kw):
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"""Executes a statement and returns a sorted list plain tuple rows."""
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return sorted([tuple(row)
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for row in statement.execute(*args, **kw).fetchall()])
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